Drive for phonograph-governors



'e. T. CHERINGTON.

DRIVE FOR PHONOGRAPH GOVERNORS.

APPLICATION FlLED MAY 26. 1920.

1,865,378, Patented Jan. 11, 1921.

INVE TOR A TTORNE Y8 UNITED STATES PATENT OFFICE.

GEORGE T. CHERINGTON, OF WAUKEGAN, ILLINOIS.

DRIVE FOR PHONOGRAPH-GOVERNORS.

Application filed May 26,

To all to 710m it may concern Be it known that I, GEORGE T. GHERING-TON, a citizen of the United States, and resident of Waukegan, county ofLake, and State of Illinois, have invented a certain new and usefulImprovement in Drives for Phonograph-Governors, of which the followingis a specification.

My invention relates to that class of devices which are employed fordriving centrifugal phonograph governors which are customarily driven bymeans of a worm and worm-wheel, or a worm and spiral-gear. As thegovernor has to travel at a very high rate of speed, it results in theproduction of more or less noise which is seemingly unavoidable or veryobjectionable because of its interference with the sound waves of themusic from the record, although numerous attempts have been made toovercome this highly objectionable feature.

My invention has for its object to provide a drive which will be sonoiseless in operation that it cannot be heard even at a distance of afew inches. lvily means of accomplishing the foregoing object may bemore readily understood by having reference to the accompanying drawingswhich are hereunto annexed and are a part of this specification, inwhich- The figure is a side elevation of a drive .equipped with myimprovement.

Similar reference numerals refer to similar parts throughout the entiredescription.

As shown in the drawings, the governor 1 is carried by the governorshaft 2, upon which is mounted a worm adapted to mesh with the teeth ofthe worm-gear or wheel at, driven by the motor of the phonograph (notshown).

The governor is provided with the customary disk 5 for regulating itsspeed, by contacting with the brake 6 which is provided with the usualfelt brake-shoe 7.

In utilizing my invention, the worm 3 is made of leather which is firstthoroughly impregnated with oil and then with graphite. The worm is thencut, and if it appears that Specification of Letters Patent.

Patented Jan. 11, 1921.

Serial No. 384,319.

the impregnating process has not succeeded any in causing the oil andgraphite to penetrate deeper than the teeth which are hobbed in theworm, the process is repeated so as to produce a worm formed of leatherwhich is completely impregnated with oil and graphite. The worm is thensecured to the governor shaft 2 and in mesh with the teeth of theworm-wheel 4.

l have demonstrated in practice that where other leans are employed forthis drive, the sound caused by the meshing of the teeth when thegovernor is traveling at high speed, is distinctly audible at from fiveto fifty feet distance, according to the different kinds of materialemployed, whereas where my form of drive is employed, it is impossibleto detect the noise of the gears even when the ear is placed within afew inches of the device, with the result that there is no interferenceat all with the sound waves produced by the record, thus resulting in ahighly improved machine.

Having described my invention what I regard as new and desire to secureby Letters Patent is:

l. A governor drive for phonographs comprising the combination with agovernor having a shaft, of a worm mounted on said shaft, said wormbeing formed of leather which is impregnated with graphite and oil, anda worm-wheel to drive said worm.

2. A governor drive for phonographs comprising the combination with agovernor having a shaft, of a worm mounted on said shaft, said wormbeing formed of leather which is impregnated with anti-frictioninaterial and means to drive said worm.

3. A governor drive for phonographs comprising the combination with agovernor having a shaft, of a worm mounted on said shaft, said .vormbeing formed of leather which is entirely impregnated with graphite andoil, and a worm-wheel to drive said worm...

In testimony whereof, I have signed the foregoing specification.

GEORGE T. CHERINGTON.

